BEGIN {
    item["1,1"] = 20;
    item["1,2"] = 30;
    item["2,1"] = 40;
    item["2,2"] = 50;
    
    for(x in item)
        print "index: ", x , " -> ", item[x];
    print "\n";

    array[1,1] = 10;
    array[1,2] = 20;
    array[2,2] = 40;

    for(x in array)
        print "index ", x, ": ", array[x];
}

